My ex sucks..

So my ex was controlling manipulative and a narcissist.. well my son had a baseball cap on an one of his ears was stuck under it. I asked if that was uncomfy an flip his ear out. So it ain't tucked under his hat. He goes.. outa no where. My dad slaps my head if my ears are out. No I can not ask his dad about this.. he will lie about it. Or get mad at my son for saying anything ugh.. it breaks my heart